Assignment #1 - Intro to Wikispaces and the Atom (10pts)

Introduction to the Atom

First, we'll need to create our own page by clicking on the "New Page" button in the upper left corner of the page. Name the page after yourself, including your first name and at least your last initial; such as "John's Page" or "Melissa and Alison's Page" or simply "John S.". Once you've created your page, you need to collect information on the Atom.

MAKE SURE YOU ADD A LINK TO THE PAGE WHERE YOU FOUND YOUR INFORMATION OR YOU WON'T GET THE POINTS!!!

Split your page into 2 sections:

1. History of the Atom (5pts)
   • Find out the important scientists who contributed to our current knowledge of the atom.

• http://wiki.answers.com/Q/Name_3_scientist_who_contributed_to_current_knowledge_of_the_atom_and_explain_their_contributions.
• JJ THOMSON AND JOHN DALTON
  • Find out the important experiments that were used to make breakthrough discoveries. http://www.visionlearning.com/library/module_viewer.php?mid=50
• Thomson's notion of the electron came from his work with a nineteenth century scientific curiosity: the cathode ray tube. For years scientists had known that if an electric current was passed through a vacuum tube, a stream of glowing material could be seen; however, no one could explain why. Thomson found that the mysterious glowing stream would bend toward a positively charged electric plate. Thomson theorized, and was later proven correct, that the stream was in fact made up of small particles, pieces of atoms that carried a negative charge. These particles were later named electrons.
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  • Include years of each discovery/experiment so we can get an idea of how long this process has taken.
  • Until 1897, scientists believed atoms were indivisible, the ultimate particles of matter, but Thomson proved them wrong when he discovered that atoms contained particles known as electrons. http://en.wikipedia.org/wiki/J._J._Thomson#Discovery_of_the_electron
  • In the early 1800, John Dalton discovered the Atomic Theory. http://en.wikipedia.org/wiki/John_Dalton

1. Atomic Structure (5pts)
   • What are the different parts of the atom?
   • What are the different particles that make up the atom?
   • Where are they located?
   • What makes atoms of different elements different?

For a bonus point:

1. Add a comment to someone's page through the discussion tab.
2. Add a picture to your page.